What remington 700 boltface will hold the 300UM?


Well-Known Member
Sep 25, 2002
Do I have to buy a 700 rem action that is already an Ultra mag or will another bolt face hold the 300UM? I don't really want to have to open it up, but I guess if I found a magnum action (preferably in stainless, HINT HINT) for the right price, I could just have it opened up. Does anyone have any thoughts on the safety margin of opening up a magnum bolt face to UM?

Thanks guys.



My 7mm STW rem 700 action will hold a rum case, as far as I know their is no difference between the rum and standard magnum bolt face other than the feed rails are opned up for the wider case for feeding.
Theres a guy in Tenn that sells actions only.
I will search for his web site if you want?


Well-Known Member
Sep 25, 2002
Please give me any information on that person or site if you can. I appreciate the help.

So if I understand correctly, a 7mm rem mag or 300 win mag action would also work if the feed rails were opened up?

Thanks again.

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